ZyXEL ZYWALL USG 100 User Guide - Page 83
Connect Using L2TP VPN, Use preshared key for authentication, Advanced Properties, Properties
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Windows 7 Chapter 4 Create Secure Connections Across the Internet Windows Vista 3 Select Use preshared key for authentication and enter the pre-shared key of the VPN gateway entry the ZyWALL is using for L2TP VPN (top-secret in this example). Click OK to save your changes and close the Advanced Properties screen. Then click OK again to close the Properties window. 4 If a warning screen about data encryption not occurring if PAP or CHAP is negotiated, click Yes. When you use L2TP VPN to connect to the ZyWALL, the ZyWALL establishes an encrypted IPSec VPN tunnel first and then builds an L2TP tunnel inside it. The L2TP tunnel itself does not need encryption since it is inside the encrypted IPSec VPN tunnel. Connect Using L2TP VPN 1 In the Network and Sharing Center screen, click Connect to a network, select the L2TP VPN connection and click Connect to display a login screen. Enter the user name and password of your ZyWALL user account and click Connect. ZyWALL USG100-PLUS User's Guide 83